Harry Warren (December 24, 1893 – September 22, 1981) was an American composer and lyricist. Warren was the first major American songwriter to write primarily for film. He was nominated for the Academy Award for Best Song eleven times and won three Oscars for composing "Lullaby of Broadway", "You'll Never Know" and "On the Atchison, Topeka and the Santa Fe". He wrote the music for the first blockbuster film musical, 42nd Street, directed and choreographed by Busby Berkeley, with whom he would collaborate on many musical films.

Over a career spanning four decades, Warren wrote over 800 songs. Other well-known Warren hits included "I Only Have Eyes for You", "You Must Have Been a Beautiful Baby", "Jeepers Creepers", "The Gold Diggers' Song (We're in the Money)", "That's Amore", "The More I See You", "At Last" and "Chattanooga Choo Choo" (the last of which was the first gold record in history). One of America's most prolific film composers, Warren's songs have been featured in over 300 films.

Warren was born Salvatore Antonio Guaragna, one of eleven children of Italian immigrants Antonio (a bootmaker) and Rachel De Luca Guaragna, and grew up in Brooklyn, New York. His father changed the family name to Warren when Harry was a child. Although his parents could not afford music lessons, Warren had an early interest in music and taught himself to play his father's accordion. He also sang in the church choir and learned to play the drums. He began to play the drums professionally by age 14 and dropped out of high school at 16 to play with his godfather's band in a traveling carnival. Soon he taught himself to play piano and by 1915, he was working at the Vitagraph Motion Picture Studios, where he did a variety of administrative jobs, such as props man, and also played mood music on the piano for the actors, acted in bit parts and eventually was an assistant director. He also played the piano in cafés and silent-movie houses. In 1918 he joined the U.S. Navy, where he began writing songs.

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